Passage 3.7.2
Εὐρυπῶντος δὲ υἱὸς γίνεται Πρύτανις. ἐπὶ μὲν δὴ Πρυτάνιδος τοῦ Εὐρυπῶντος τὸ ἔχθος τε Λακεδαιμονίοις ἤρξατο τὸ ἐς Ἀργείους καὶ ἔτι τοῦ ἐγκλήματος τούτου πρότερον Κυνουρεῦσιν ἐπολέμησαν· τὰς δὲ ἐφεξῆς ταύτῃ γενεάς, Εὐνόμου τε τοῦ Πρυτάνιδος καὶ Πολυδέκτου τοῦ Εὐνόμου βασιλευόντων, ἐν εἰρήνῃ διετέλεσεν οὖσα ἡ Σπάρτη.
The son of Eurypon was Prytanis. It was during the reign of Prytanis, son of Eurypon, that hostility first arose between the Lacedaemonians and the Argives; even earlier they had already waged war against the Cynurians. But the following generations, while Eunomus, son of Prytanis, and Polydectes, son of Eunomus, were kings, continued to dwell in peace at Sparta.